1 files changed, 1 insertions, 1 deletions
diff --git a/cores/arduino/Print.cpp b/cores/arduino/Print.cpp
index 4ee556d..fd68942 100755
--- a/cores/arduino/Print.cpp
+++ b/cores/arduino/Print.cpp
@@ -45,7 +45,7 @@ void Print::write(const uint8_t *buffer, size_t size)
 
 void Print::print(const String &s)
 {
-  for (int i = 0; i < s.length(); i++) {
+  for (unsigned int i = 0; i < s.length(); i++) {
     write(s[i]);
   }
 }